makikulit said:hello, i just would like to ask what is the proper orientation in installing a G type circlip, some says the open end should point to the crankcase 6 o'clock, others says that open end should be at 3 o'clock position whats right?
thanks
ANy reasons for that?Browni said:And it's important that the openig end of the circlip points to the stroke direction, so 12 hour or 6 hour /if the piston is in a flat place/!
The weight of the ear(s)?Hans F. said:quite obvious, if you put them another way, you'll end up stressing the circlip with the weight of the ear. Which can let them fail.
Folkert@MinaRally said:I disagree. This discussion has come up before. I have ALWAYS used the "b" type (2 arms) version, even in my current Polini Evolution 70cc cilinder which does 13.500rpm.
NO PROBLEM AT ALL. I've used these types ever since I started with scooters, WAY back in 1996. I had never one fail on me, even after REUSING the same ones. (I didn't bother changing them after taking the piston off once or twice).
I'm not saying anyone else should or should not, but to every rule is the "exception" and I guess I am that exception on this one.
Just telling.
Now about whether they should be in de 6/12 or 3/9 position, not sure about that "arm weight" thing, but what (also) is the case, is for the fact the piston moves vertically.
So you have to put the clips in de 6/12 position (I always have the opening facing down).
Just think about it. If you would put them in 3/9 -perpendicular to the piston's movement- will put forces on the clip, in the same direction as when you take them out (the arms are forced together).
This is a sureguarentee they will come out off their seats and mess up your barrels and piston. Maybe worse.
Browni said:It's very simple! You are lucky!!
I haven't got problems too, cause I use all pistons without ears, but I saw many cylinder damage (not only with scooters) cause the ears broke OFF!
Once you hold a used circlip (with ears) look at it with a magnifying glass, and you will see it has got a lot of scratches at the bootom of the ear, in extreme conditions, it can easily tail away, and then fall off!